Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 4e8ea1017be56fac…

MALICIOUS

RTF / .DOC

285.1 KB
MD5: f2444a3b424c0b960aa94c8155790c37 SHA-1: 39b55333faa0d88bdad284cb82bb9da377fee00f SHA-256: 4e8ea1017be56facec1de02add7e172f3dafb0c50cba27e52ad35c878b970fc6
180 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1059 Command and Scripting Interpreter T1059.005 Command and Scripting Interpreter: Visual Basic

The RTF document contains multiple OLE objects, including automatically linked and updated objects, indicating an attempt to execute embedded content. The 'SE_ENABLE_LURE' heuristic and the 'Please click Enable Editing to view the document.' text strongly suggest a social engineering tactic to bypass macro security. The embedded OLE objects are likely designed to download and execute a secondary payload.

Heuristics 6

  • Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED
    RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
  • Automatically linked OLE object high RTF_OBJAUTLINK
    RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
  • \objupdate forces OLE activation high RTF_OBJUPDATE
    RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
  • OLE object data medium RTF_OBJDATA
    RTF contains 3 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000c31.bin
73b0f0bf5351916585098c2fa3183fbbe9e1b9317272f6ba50b0e01c0e45fe64		 rtf-objdata-decoded RTF \objdata at offset 0xC31 47817 bytes
objdata_01_off00019111.bin
ed9824f206c5eefefb96abc0f5bbe364ff859fbc1cb881f0e87b69915176c8b2		 rtf-objdata-decoded RTF \objdata at offset 0x19111 2632 bytes
objdata_02_off0001a6b4.bin
e8d4fe950caed6dcfde26f4b616825bbe11b93458425974b7d075167f675abf7		 rtf-objdata-decoded RTF \objdata at offset 0x1A6B4 12297 bytes

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